Merge pull request 'Remove generic_energy_system methods add loop for generation_systems' (#1) from fix/generation_systems into main

Reviewed-on: #1

co2_emission/co2_emission.py

@@ -40,7 +40,8 @@ class Co2Emission:
     """
     results = {}
     for energy_system in self._building.energy_systems:
-      fuel_type = energy_system.generation_system.generic_generation_system.fuel_type
+      for generation_system in energy_system.generation_systems:
+        fuel_type = generation_system.fuel_type
         emissions_factor = self._emissions_factor[fuel_type]
         for demand_type in energy_system.demand_types:
           if demand_type == cte.ELECTRICITY:
@@ -59,6 +60,7 @@ class Co2Emission:
               values = [v * emissions_factor for v in self._building.domestic_hot_water_consumption[time_period]]
               results_by_time_period[time_period] = values
           results[demand_type] = results_by_time_period
+
     emission_factor = self._emissions_factor[cte.ELECTRICITY]
     results_by_time_period = {}
     for time_period in self._building.lighting_electrical_demand: